Oscar h



-0. H. KOELKER.

PUMP.

APPLICATION FILED MAII. s, IeIa.

1,324,905. Patented Dec. 16,1919.

51401214101, 05cm* H. /Ia-e/Aer mak HMM ma UNITED STATES PATENT oEEIcE.

OSCAR H. KOELKER, OF TOLEDO, OHIO, ASSIGNOR T0 THE WILLYSAOVERLAND COMPANY,

OF TOLEDO, OHIO, A CORPORATION OF OHIO. i

PUMP.

Application led March 6, 1918. Serial No. 220,749.

To all whom t may concern:

Be it known that I, OSCAR H. KQELKER,

residing at Toledo, in the county of Lucas pumps and more particularly to oil umps of the type used in connection with t e lubrication systemsof motor vehicles.

The principal object of this inventlon is to provide an oil pump for use in connection with motor vehicles, which is very lsimple m construction and in which the number of parts is reduced to a minimum.

A further object of `this invention 1s to provide an improved loil pump for usevin connection with motor vehicles and ada ted to beactuated by a rotating cam, w ich pump shall always be primed.

Further objects, and objects relating to economies of manufacture and details of construction, will deinitel appear from the detailed description to fo ow.

I accomplish the objects of my'invention by the devices and means descrlbed in the following specification. My invention is clearly deined and pointed out in the appended claims.

A structure constituting a preferred embodiment ofv my invnetion is illustrated in the accompanying drawing, forming a part of this specilication, in whichl Figure I is a view in front-elevation of a pump embodying my invention.

Fig. II is a transverse sectional view, taken substantially on the line lII-II of Figs. I and III.

Fig. III is a detail, sectional view, taken substantially on the'line III- III of Figs. II and IV, and

Fig. IV is a view in side elevation of the ump. Y

In the drawings similar reference numerals refer to simi arparts throughout the Several views, and the sectional views are taken looking in the direction o the little arrows at the ends'of the section lines.

Considering the numbered parts of the drawing, I have shown a pump comprising the body portion 12l having` a laterally eX- tending Bange 10, 'provide with the openings 11 therein, by meansof which the pump Specification of Letters Patent.

Patented Dec. 16,' l1919.

can be attached to any suitable su port. The body portion 12 has the forwardly extending cylindrical part 13 provided with a cylindrical chamber 14 therein. Piston 15 reciprocates within the chamber 14;, and the end of said piston 15 is engaged by a rotating cam 16, which is driven by any suitable moving part of the motorfjvehicle. Piston 15 has a cylindrical recess 17 therein, within which a coiled compression spring 18 is housed, being compressed between the bottom of the recess 17 and the bottom of the chamber 14. A

Passage 19 connects the chamber 1 4 with a chamberl 21 in thebody portion l2 of the pump. The re'ar end of the chamber 21 is' closed 'by the plug 24, and communication between the passage 19 and the chamber 21 is controlled by the check valve comprising the ball 23 and the spring 22, which-is compressed between the plug 24 and said ball 23. A port 25 communicates with the chamber 21, and terminates in a nipple 26, screwed into the end of said port, to which a suitable conduit may be attached leading to an oil indicator. A port27 opens into the inclined ort 25, and connects said port with 'a cham- Eer 28 formed in the body portion 12 of the pump. The lower end of said chamber 28 is closed by the plug 31, which is screwed into said chamber andcarries a pin 30, as shwn in Fig. II of the drawing. A check valve controls the Comunication between the ort 27 andthe chamber 28, said valve inclu ing the ball4 29 and the spring 42, which compressed between the plug 31 and the ball, around the pin 30. A laterally-extending port 40 opens into the chamber 28 and terminates in the nipple 41 which may be connected to a conduit leading to the parts to be supplied with oil.

A passage 20 also communicates with the cylindrical chamber 14, in which the piston 15 works and Said passage 20 opens Into a chamber 20', as shown in Fig. II :of the drawing. A nipple 32 is screwed into the end of the chamber 20 and hasY a recess 33- therein, which receives a check valve controlling communication between the intake and the recess 33 with which it connects. A port 38 opens into the chamber 33 and a ball 37 controls said port 38 and is `held inl carried by the upper end of nipple 32 and has a plurality of ports connecting chamber 20 and recess 33. rPhe nipple 32 is threaded at 39 and may be connected by a suitable conduit to the source of oil supply from which oil is to be drawn into the pump.

From the description of the parts given above, the operation of this device should be very readily understood. The rotating cam 16 engages the piston 15 and reci rocates it in the cylindrical chamber 14. The cam 16 moves the piston inwardly, while the spring 18, which is housed within the recess 17 of the piston, serves to move the piston outwardly and keep its end in contact with the cam. The piston is shown in Fig. II in its innermost position and as the cam rotates and the piston moves outwardly under the iniuence of the spring 18, a suction will be created in the chamber 14 so that oil will be drawn past the ball valve 37, and the disk 34, from the inlet into the chamber 14. The check valve 23 controls the communication between the passage 19 and chamber 21 and the chamber 14, so that no oil will be drawn into the chamber 14 past the valve 23. When the piston 15 has completed its outward stroke and starts to move inwardly, the oil which has been drawn into the chamber 14, will be put under pressure and forced out through the passage 19 and past the ball valve 23, into the chamber 21 and inclined port 25. This inclined port 25 delivers oil to the oil gage, which shows whether or not oil is, being sent through the system, and through the downwardly extending port 27, past the ball valve 28 and through the laterally extending port to the outlet of the pump. The ball valve 37 prevents oil being forced out of the chamber 14 to the inlet p1 e.

l am aware that the particular embodiment of my invention, which I have here shown and described, is susceptible of considerable variation without departing from the spirit thereof, and, therefore, l desire to claim my invention broadly, as well as specifically, as indicated by the appended claims.

`Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a device of the, class described, an integral casing provided with cylindrical chambers extending inwardly from the outer surface of the casing, a passage connecting said chambers, a piston reciprocable in one of said chambers, a spring pressed check valve controlling communication between the chambers, an inlet passage communicating with one of said chambers and an outlet passage communicating with the other chamber, and a check valve positioned in each of said last named passages.'

2. In a device 0i: the class described, an integra-l casing provided with oppositely positioned cylindrical chambers extending inwardly from opposite sides of the casing, said chambers being connected by a passage, a piston reciprocable in one of said chambers, a spring-pressed check valve controlling communication between the chambers, an intake passage communicating with said piston chamber, and a combined outlet and indicator passage communicating with the other chamber and checlr valvespositioned in the inlet and outlet assa es.

ln testimony whereor, 1 a 'X my signature.

@SCAR H. KOELKER. 

